The standard Boxster and Cayman are fitted exclusively with turbocharged flat-4 engines, but the more potent versions are expected to run naturally aspirated flat-6 engines, just like their predecessors.

Other upgrades will include lowered suspension, a more aggressive aero kit with larger intakes, plus uprated brakes and sharpened steering. We can also see that the exhaust tips have been moved away from the center of the rear bumper, like on the last Cayman GT4, and more toward the outer flanks. There's also a much bigger rear wing fitted to the latest testers.

Production will be limited, so if you’re interested in parking one on your driveway you better start cozying up to your local Porsche dealer. These special editions typically sell out fast.

Note, there's also a GT4-spec racing version in the works, known as the Clubsport. A prototype was recently spotted testing at Italy's Monza.